This AI Accounting Startup Hit $1.15B Valuation - Used by 30% of Top 25 US Firms

The Fastest Unicorn in Accounting

Basis went from $3.6M seed to $1.15B valuation in under 2 years. The trajectory: seed, then $34M Series A led by Khosla Ventures (December 2024), then $100M at unicorn valuation (February 2026).

The angel investor list reads like a who's who of tech and policy: Jeff Dean (Google Chief Scientist), Larry Summers (former US Treasury Secretary), Adam D'Angelo (Quora CEO, early Facebook CTO).

What Basis Actually Does

Basis built AI agents that autonomously complete tax returns. They demonstrated the first-ever autonomous 1065 tax return (partnership tax filing). Their agents handle the complete workflow that previously required junior tax accountants spending days on each return.

Already used by 30% of the top 25 US accounting firms.

Why Accountants Should Pay Attention

Tax preparation is a $14B market in the US alone. The average CPA firm bills $150-300/hour for work that is largely following rules (tax code) applied to data (financial records). This is exactly what AI agents do best: rules-based processing at scale.

When Google's Chief Scientist invests in your accounting AI startup, it's not because he's interested in taxes. It's because he sees the pattern: knowledge work that follows rules gets automated.

First autonomous 1065 tax return. 30% of top 25 firms already using it. $1.15B valuation. This isn't a prediction about the future of accounting. It's the present.

The Breakout Pattern

Basis proves that even the most regulated, traditional professions are not immune. When AI can file a tax return autonomously, the question isn't if accounting changes. It's how fast.

That's the breakout.